WOLFRAM SYSTEM MODELER
OpenCenterHydraulicSystemExample circuit with a pump that unloads to a reservoir when inactive |
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Diagram
Wolfram Language
In[1]:=
SystemModel["Hydraulic.Examples.Rotation.OpenCenterHydraulicSystem"]
Out[1]:=
Information
This example shows three motors that are driven by a pump. Each motor has a different load. The open center valves direct pump flow to a reservoir when no motors are running. This means that the pump will not have to run constantly at the relief valve setting.
Fig. 1 shows how the three control valves are opened and then closed one after another. Fig. 2 shows how the motors start to spin and then stop when the corresponding valve is opened and closed. Fig. 3 shows how the open center design succeeds in reducing pump torque when no motor is used.
Fig. 1 Control valve opening states
Fig. 2 Motor speeds
Fig. 3 Pump torque
Fig. 1 shows how the three control valves are opened and then closed one after another. Fig. 2 shows how the motors start to spin and then stop when the corresponding valve is opened and closed. Fig. 3 shows how the open center design succeeds in reducing pump torque when no motor is used.
Fig. 1 Control valve opening states
Fig. 2 Motor speeds
Fig. 3 Pump torque
Parameters (1)
| medium |
Value: Oil() Type: Medium Description: Medium in the component |
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Components (36)
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medium |
Type: Medium Description: Medium in the component |
|---|---|---|
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tank5 |
Type: Tank Description: Simple tank with constant pressure |
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tank6 |
Type: Tank Description: Simple tank with constant pressure |
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pump |
Type: Pump Description: Model of a pump with fixed displacement and volumes |
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volume1 |
Type: Volume Description: Fixed volume with fluid storage |
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constantSpeed |
Type: ConstantSpeed Description: Constant speed, not dependent on torque |
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pressureReliefValve |
Type: PressureReliefValve Description: Pressure valve, controlled by the pressure difference between the ports |
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controlValve2 |
Type: PCVE63 Description: Electrically actuated proportional control valve with six ports and three states |
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const2 |
Type: Constant Description: Generate constant signal of type Real |
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tank1 |
Type: Tank Description: Simple tank with constant pressure |
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const3 |
Type: Constant Description: Generate constant signal of type Real |
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controlValve3 |
Type: PCVE63 Description: Electrically actuated proportional control valve with six ports and three states |
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const1 |
Type: Constant Description: Generate constant signal of type Real |
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controlValve1 |
Type: PCVE63 Description: Electrically actuated proportional control valve with six ports and three states |
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volume2 |
Type: Volume Description: Fixed volume with fluid storage |
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volume3 |
Type: Volume Description: Fixed volume with fluid storage |
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tank2 |
Type: Tank Description: Simple tank with constant pressure |
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tank3 |
Type: Tank Description: Simple tank with constant pressure |
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tank4 |
Type: Tank Description: Simple tank with constant pressure |
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motor1 |
Type: Motor Description: Model of a motor with fixed displacement and volumes |
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inertia1 |
Type: Inertia Description: 1D-rotational component with inertia |
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speedSensor1 |
Type: SpeedSensor Description: Ideal sensor to measure the absolute flange angular velocity |
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speedSensor2 |
Type: SpeedSensor Description: Ideal sensor to measure the absolute flange angular velocity |
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inertia2 |
Type: Inertia Description: 1D-rotational component with inertia |
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motor2 |
Type: Motor Description: Model of a motor with fixed displacement and volumes |
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speedSensor3 |
Type: SpeedSensor Description: Ideal sensor to measure the absolute flange angular velocity |
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inertia3 |
Type: Inertia Description: 1D-rotational component with inertia |
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motor3 |
Type: Motor Description: Model of a motor with fixed displacement and volumes |
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singlePulse1 |
Type: SinglePulse Description: Model that generates a single pulse signal of type Real |
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gain1 |
Type: Gain Description: Output the product of a gain value with the input signal |
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gain2 |
Type: Gain Description: Output the product of a gain value with the input signal |
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singlePulse2 |
Type: SinglePulse Description: Model that generates a single pulse signal of type Real |
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singlePulse3 |
Type: SinglePulse Description: Model that generates a single pulse signal of type Real |
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gain3 |
Type: Gain Description: Output the product of a gain value with the input signal |
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constantTorque3 |
Type: ConstantTorque Description: Constant torque, not dependent on speed |
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constantTorque2 |
Type: ConstantTorque Description: Constant torque, not dependent on speed |